mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
781 lines
20 KiB
PHP
781 lines
20 KiB
PHP
<?php
|
|
|
|
namespace SilverStripe\Assets;
|
|
|
|
use SilverStripe\Assets\Storage\DBFile;
|
|
use SilverStripe\Assets\Storage\AssetContainer;
|
|
use SilverStripe\Assets\Storage\AssetStore;
|
|
use SilverStripe\Core\Config\Config;
|
|
use SilverStripe\Core\Convert;
|
|
use SilverStripe\Core\Injector\Injector;
|
|
use SilverStripe\ORM\FieldType\DBField;
|
|
use SilverStripe\ORM\FieldType\DBHTMLText;
|
|
use InvalidArgumentException;
|
|
|
|
/**
|
|
* Provides image manipulation functionality.
|
|
* Provides limited thumbnail generation functionality for non-image files.
|
|
* Should only be applied to implementors of AssetContainer
|
|
*
|
|
* Allows raw images to be resampled via Resampled()
|
|
*
|
|
* Image scaling manipluations, including:
|
|
* - Fit()
|
|
* - FitMax()
|
|
* - ScaleWidth()
|
|
* - ScaleMaxWidth()
|
|
* - ScaleHeight()
|
|
* - ScaleMaxHeight()
|
|
* - ResizedImage()
|
|
*
|
|
* Image cropping manipulations, including:
|
|
* - CropHeight()
|
|
* - CropWidth()
|
|
* - Fill()
|
|
* - FillMax()
|
|
*
|
|
* Thumbnail generation methods including:
|
|
* - Icon()
|
|
* - CMSThumbnail()
|
|
*
|
|
* @mixin AssetContainer
|
|
*/
|
|
trait ImageManipulation {
|
|
|
|
/**
|
|
* @return string Data from the file in this container
|
|
*/
|
|
abstract public function getString();
|
|
|
|
/**
|
|
* @return resource Data stream to the asset in this container
|
|
*/
|
|
abstract public function getStream();
|
|
|
|
/**
|
|
* @param bool $grant Ensures that the url for any protected assets is granted for the current user.
|
|
* @return string public url to the asset in this container
|
|
*/
|
|
abstract public function getURL($grant = true);
|
|
|
|
/**
|
|
* @return string The absolute URL to the asset in this container
|
|
*/
|
|
abstract public function getAbsoluteURL();
|
|
|
|
/**
|
|
* Get metadata for this file
|
|
*
|
|
* @return array|null File information
|
|
*/
|
|
abstract public function getMetaData();
|
|
|
|
/**
|
|
* Get mime type
|
|
*
|
|
* @return string Mime type for this file
|
|
*/
|
|
abstract public function getMimeType();
|
|
|
|
/**
|
|
* Return file size in bytes.
|
|
*
|
|
* @return int
|
|
*/
|
|
abstract public function getAbsoluteSize();
|
|
|
|
/**
|
|
* Determine if this container has a valid value
|
|
*
|
|
* @return bool Flag as to whether the file exists
|
|
*/
|
|
abstract public function exists();
|
|
|
|
/**
|
|
* Get value of filename
|
|
*
|
|
* @return string
|
|
*/
|
|
abstract public function getFilename();
|
|
|
|
/**
|
|
* Get value of hash
|
|
*
|
|
* @return string
|
|
*/
|
|
abstract public function getHash();
|
|
|
|
/**
|
|
* Get value of variant
|
|
*
|
|
* @return string
|
|
*/
|
|
abstract public function getVariant();
|
|
|
|
/**
|
|
* Determine if a valid non-empty image exists behind this asset
|
|
*
|
|
* @return bool
|
|
*/
|
|
abstract public function getIsImage();
|
|
|
|
/**
|
|
* @config
|
|
* @var bool Force all images to resample in all cases
|
|
*/
|
|
private static $force_resample = true;
|
|
|
|
/**
|
|
* @config
|
|
* @var int The width of an image thumbnail in a strip.
|
|
*/
|
|
private static $strip_thumbnail_width = 50;
|
|
|
|
/**
|
|
* @config
|
|
* @var int The height of an image thumbnail in a strip.
|
|
*/
|
|
private static $strip_thumbnail_height = 50;
|
|
|
|
/**
|
|
* The width of an image thumbnail in the CMS.
|
|
*
|
|
* @config
|
|
* @var int
|
|
*/
|
|
private static $cms_thumbnail_width = 100;
|
|
|
|
/**
|
|
* The height of an image thumbnail in the CMS.
|
|
*
|
|
* @config
|
|
* @var int
|
|
*/
|
|
private static $cms_thumbnail_height = 100;
|
|
|
|
/**
|
|
* The width of an image preview in the Asset section
|
|
*
|
|
* @config
|
|
* @var int
|
|
*/
|
|
private static $asset_preview_width = 930; // max for mobile full-width
|
|
|
|
/**
|
|
* The height of an image preview in the Asset section
|
|
*
|
|
* @config
|
|
* @var int
|
|
*/
|
|
private static $asset_preview_height = 336;
|
|
|
|
/**
|
|
* Fit image to specified dimensions and fill leftover space with a solid colour (default white). Use in templates with $Pad.
|
|
*
|
|
* @param integer $width The width to size to
|
|
* @param integer $height The height to size to
|
|
* @param string $backgroundColor
|
|
* @return AssetContainer
|
|
*/
|
|
public function Pad($width, $height, $backgroundColor = 'FFFFFF') {
|
|
if($this->isSize($width, $height)) {
|
|
return $this;
|
|
}
|
|
|
|
$variant = $this->variantName(__FUNCTION__, $width, $height, $backgroundColor);
|
|
return $this->manipulateImage(
|
|
$variant,
|
|
function(Image_Backend $backend) use($width, $height, $backgroundColor) {
|
|
return $backend->paddedResize($width, $height, $backgroundColor);
|
|
}
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Forces the image to be resampled, if possible
|
|
*
|
|
* @return AssetContainer
|
|
*/
|
|
public function Resampled() {
|
|
// If image is already resampled, return self reference
|
|
$variant = $this->getVariant();
|
|
if($variant) {
|
|
return $this;
|
|
}
|
|
|
|
// Resample, but fallback to original object
|
|
$result = $this->manipulateImage(__FUNCTION__, function(Image_Backend $backend) {
|
|
return $backend;
|
|
});
|
|
if($result) {
|
|
return $result;
|
|
}
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Update the url to point to a resampled version if forcing
|
|
*
|
|
* @param string $url
|
|
*/
|
|
public function updateURL(&$url) {
|
|
// Skip if resampling is off, or is already resampled, or is not an image
|
|
if(!Config::inst()->get(get_class($this), 'force_resample') || $this->getVariant() || !$this->getIsImage()) {
|
|
return;
|
|
}
|
|
|
|
// Attempt to resample
|
|
$resampled = $this->Resampled();
|
|
if(!$resampled) {
|
|
return;
|
|
}
|
|
|
|
// Only update if resampled file is a smaller file size
|
|
if($resampled->getAbsoluteSize() < $this->getAbsoluteSize()) {
|
|
$url = $resampled->getURL();
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate a resized copy of this image with the given width & height.
|
|
* This can be used in templates with $ResizedImage but should be avoided,
|
|
* as it's the only image manipulation function which can skew an image.
|
|
*
|
|
* @param integer $width Width to resize to
|
|
* @param integer $height Height to resize to
|
|
* @return AssetContainer
|
|
*/
|
|
public function ResizedImage($width, $height) {
|
|
if($this->isSize($width, $height)) {
|
|
return $this;
|
|
}
|
|
|
|
$variant = $this->variantName(__FUNCTION__, $width, $height);
|
|
return $this->manipulateImage($variant, function(Image_Backend $backend) use ($width, $height) {
|
|
return $backend->resize($width, $height);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Scale image proportionally to fit within the specified bounds
|
|
*
|
|
* @param integer $width The width to size within
|
|
* @param integer $height The height to size within
|
|
* @return AssetContainer
|
|
*/
|
|
public function Fit($width, $height) {
|
|
// Prevent divide by zero on missing/blank file
|
|
if(!$this->getWidth() || !$this->getHeight()) {
|
|
return null;
|
|
}
|
|
|
|
// Check if image is already sized to the correct dimension
|
|
$widthRatio = $width / $this->getWidth();
|
|
$heightRatio = $height / $this->getHeight();
|
|
|
|
if( $widthRatio < $heightRatio ) {
|
|
// Target is higher aspect ratio than image, so check width
|
|
if($this->isWidth($width)) {
|
|
return $this;
|
|
}
|
|
} else {
|
|
// Target is wider or same aspect ratio as image, so check height
|
|
if($this->isHeight($height)) {
|
|
return $this;
|
|
}
|
|
}
|
|
|
|
// Item must be regenerated
|
|
$variant = $this->variantName(__FUNCTION__, $width, $height);
|
|
return $this->manipulateImage($variant, function(Image_Backend $backend) use ($width, $height) {
|
|
return $backend->resizeRatio($width, $height);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Proportionally scale down this image if it is wider or taller than the specified dimensions.
|
|
* Similar to Fit but without up-sampling. Use in templates with $FitMax.
|
|
*
|
|
* @uses ScalingManipulation::Fit()
|
|
* @param integer $width The maximum width of the output image
|
|
* @param integer $height The maximum height of the output image
|
|
* @return AssetContainer
|
|
*/
|
|
public function FitMax($width, $height) {
|
|
return $this->getWidth() > $width || $this->getHeight() > $height
|
|
? $this->Fit($width,$height)
|
|
: $this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Scale image proportionally by width. Use in templates with $ScaleWidth.
|
|
*
|
|
* @param integer $width The width to set
|
|
* @return AssetContainer
|
|
*/
|
|
public function ScaleWidth($width) {
|
|
if($this->isWidth($width)) {
|
|
return $this;
|
|
}
|
|
|
|
$variant = $this->variantName(__FUNCTION__, $width);
|
|
return $this->manipulateImage($variant, function(Image_Backend $backend) use ($width) {
|
|
return $backend->resizeByWidth($width);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Proportionally scale down this image if it is wider than the specified width.
|
|
* Similar to ScaleWidth but without up-sampling. Use in templates with $ScaleMaxWidth.
|
|
*
|
|
* @uses ScalingManipulation::ScaleWidth()
|
|
* @param integer $width The maximum width of the output image
|
|
* @return AssetContainer
|
|
*/
|
|
public function ScaleMaxWidth($width) {
|
|
return $this->getWidth() > $width
|
|
? $this->ScaleWidth($width)
|
|
: $this;
|
|
}
|
|
|
|
/**
|
|
* Scale image proportionally by height. Use in templates with $ScaleHeight.
|
|
*
|
|
* @param int $height The height to set
|
|
* @return AssetContainer
|
|
*/
|
|
public function ScaleHeight($height) {
|
|
if($this->isHeight($height)) {
|
|
return $this;
|
|
}
|
|
|
|
$variant = $this->variantName(__FUNCTION__, $height);
|
|
return $this->manipulateImage($variant, function(Image_Backend $backend) use ($height) {
|
|
return $backend->resizeByHeight($height);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Proportionally scale down this image if it is taller than the specified height.
|
|
* Similar to ScaleHeight but without up-sampling. Use in templates with $ScaleMaxHeight.
|
|
*
|
|
* @uses ScalingManipulation::ScaleHeight()
|
|
* @param integer $height The maximum height of the output image
|
|
* @return AssetContainer
|
|
*/
|
|
public function ScaleMaxHeight($height) {
|
|
return $this->getHeight() > $height
|
|
? $this->ScaleHeight($height)
|
|
: $this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Crop image on X axis if it exceeds specified width. Retain height.
|
|
* Use in templates with $CropWidth. Example: $Image.ScaleHeight(100).$CropWidth(100)
|
|
*
|
|
* @uses CropManipulation::Fill()
|
|
* @param integer $width The maximum width of the output image
|
|
* @return AssetContainer
|
|
*/
|
|
public function CropWidth($width) {
|
|
return $this->getWidth() > $width
|
|
? $this->Fill($width, $this->getHeight())
|
|
: $this;
|
|
}
|
|
|
|
/**
|
|
* Crop image on Y axis if it exceeds specified height. Retain width.
|
|
* Use in templates with $CropHeight. Example: $Image.ScaleWidth(100).CropHeight(100)
|
|
*
|
|
* @uses CropManipulation::Fill()
|
|
* @param integer $height The maximum height of the output image
|
|
* @return AssetContainer
|
|
*/
|
|
public function CropHeight($height) {
|
|
return $this->getHeight() > $height
|
|
? $this->Fill($this->getWidth(), $height)
|
|
: $this;
|
|
}
|
|
|
|
/**
|
|
* Crop this image to the aspect ratio defined by the specified width and height,
|
|
* then scale down the image to those dimensions if it exceeds them.
|
|
* Similar to Fill but without up-sampling. Use in templates with $FillMax.
|
|
*
|
|
* @uses ImageManipulation::Fill()
|
|
* @param integer $width The relative (used to determine aspect ratio) and maximum width of the output image
|
|
* @param integer $height The relative (used to determine aspect ratio) and maximum height of the output image
|
|
* @return AssetContainer
|
|
*/
|
|
public function FillMax($width, $height) {
|
|
// Prevent divide by zero on missing/blank file
|
|
if(!$this->getWidth() || !$this->getHeight()) {
|
|
return null;
|
|
}
|
|
|
|
// Is the image already the correct size?
|
|
if ($this->isSize($width, $height)) {
|
|
return $this;
|
|
}
|
|
|
|
// If not, make sure the image isn't upsampled
|
|
$imageRatio = $this->getWidth() / $this->getHeight();
|
|
$cropRatio = $width / $height;
|
|
// If cropping on the x axis compare heights
|
|
if ($cropRatio < $imageRatio && $this->getHeight() < $height) {
|
|
return $this->Fill($this->getHeight() * $cropRatio, $this->getHeight());
|
|
}
|
|
|
|
// Otherwise we're cropping on the y axis (or not cropping at all) so compare widths
|
|
if ($this->getWidth() < $width) {
|
|
return $this->Fill($this->getWidth(), $this->getWidth() / $cropRatio);
|
|
}
|
|
|
|
return $this->Fill($width, $height);
|
|
}
|
|
|
|
/**
|
|
* Resize and crop image to fill specified dimensions.
|
|
* Use in templates with $Fill
|
|
*
|
|
* @param integer $width Width to crop to
|
|
* @param integer $height Height to crop to
|
|
* @return AssetContainer
|
|
*/
|
|
public function Fill($width, $height) {
|
|
if($this->isSize($width, $height)) {
|
|
return $this;
|
|
}
|
|
|
|
// Resize
|
|
$variant = $this->variantName(__FUNCTION__, $width, $height);
|
|
return $this->manipulateImage($variant, function(Image_Backend $backend) use ($width, $height) {
|
|
return $backend->croppedResize($width, $height);
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Default CMS thumbnail
|
|
*
|
|
* @return DBFile|DBHTMLText Either a resized thumbnail, or html for a thumbnail icon
|
|
*/
|
|
public function CMSThumbnail() {
|
|
$width = (int)Config::inst()->get(get_class($this), 'cms_thumbnail_width');
|
|
$height = (int)Config::inst()->get(get_class($this), 'cms_thumbnail_height');
|
|
return $this->ThumbnailIcon($width, $height);
|
|
}
|
|
|
|
/**
|
|
* Generates a thumbnail for use in the gridfield view
|
|
*
|
|
* @return AssetContainer|DBHTMLText Either a resized thumbnail, or html for a thumbnail icon
|
|
*/
|
|
public function StripThumbnail() {
|
|
$width = (int)Config::inst()->get(get_class($this), 'strip_thumbnail_width');
|
|
$height = (int)Config::inst()->get(get_class($this), 'strip_thumbnail_height');
|
|
return $this->ThumbnailIcon($width, $height);
|
|
}
|
|
|
|
/**
|
|
* Get preview for this file
|
|
*
|
|
* @return AssetContainer|DBHTMLText Either a resized thumbnail, or html for a thumbnail icon
|
|
*/
|
|
public function PreviewThumbnail() {
|
|
$width = (int)Config::inst()->get(get_class($this), 'asset_preview_width');
|
|
return $this->ScaleMaxWidth($width) ?: $this->IconTag();
|
|
}
|
|
|
|
/**
|
|
* Default thumbnail generation for Images
|
|
*
|
|
* @param int $width
|
|
* @param int $height
|
|
* @return AssetContainer
|
|
*/
|
|
public function Thumbnail($width, $height) {
|
|
return $this->Pad($width, $height);
|
|
}
|
|
|
|
/**
|
|
* Thubnail generation for all file types.
|
|
*
|
|
* Resizes images, but returns an icon <img /> tag if this is not a resizable image
|
|
*
|
|
* @param int $width
|
|
* @param int $height
|
|
* @return AssetContainer|DBHTMLText
|
|
*/
|
|
public function ThumbnailIcon($width, $height) {
|
|
return $this->Thumbnail($width, $height) ?: $this->IconTag();
|
|
}
|
|
|
|
/**
|
|
* Get HTML for img containing the icon for this file
|
|
*
|
|
* @return DBHTMLText
|
|
*/
|
|
public function IconTag() {
|
|
return DBField::create_field(
|
|
'HTMLFragment',
|
|
'<img src="' . Convert::raw2att($this->getIcon()) . '" />'
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Get URL to thumbnail of the given size.
|
|
*
|
|
* May fallback to default icon
|
|
*
|
|
* @param int $width
|
|
* @param int $height
|
|
* @return string
|
|
*/
|
|
public function ThumbnailURL($width, $height) {
|
|
$thumbnail = $this->Thumbnail($width, $height);
|
|
if($thumbnail) {
|
|
return $thumbnail->getURL();
|
|
}
|
|
return $this->getIcon();
|
|
}
|
|
|
|
/**
|
|
* Return the relative URL of an icon for the file type,
|
|
* based on the {@link appCategory()} value.
|
|
* Images are searched for in "framework/images/app_icons/".
|
|
*
|
|
* @return string URL to icon
|
|
*/
|
|
public function getIcon() {
|
|
$filename = $this->getFilename();
|
|
$ext = pathinfo($filename, PATHINFO_EXTENSION);
|
|
return File::get_icon_for_extension($ext);
|
|
}
|
|
|
|
/**
|
|
* Get Image_Backend instance for this image
|
|
*
|
|
* @return Image_Backend
|
|
*/
|
|
public function getImageBackend() {
|
|
if(!$this->getIsImage()) {
|
|
return null;
|
|
}
|
|
|
|
// Create backend for this object
|
|
/** @skipUpgrade */
|
|
return Injector::inst()->createWithArgs('Image_Backend', array($this));
|
|
}
|
|
|
|
/**
|
|
* Get the dimensions of this Image.
|
|
*
|
|
* @param string $dim One of the following:
|
|
* - "string": return the dimensions in string form
|
|
* - "array": it'll return the raw result
|
|
* - 0: return the height
|
|
* - 1: return the width
|
|
* @return string|int|array|null
|
|
*/
|
|
public function getDimensions($dim = "string") {
|
|
if(!$this->getIsImage()) {
|
|
return null;
|
|
}
|
|
|
|
$content = $this->getString();
|
|
if(!$content) {
|
|
return null;
|
|
}
|
|
|
|
// Get raw content
|
|
$size = getimagesizefromstring($content);
|
|
if($size === false) {
|
|
return null;
|
|
}
|
|
|
|
if($dim === 'array') {
|
|
return $size;
|
|
}
|
|
|
|
// Get single dimension
|
|
if(is_numeric($dim)) {
|
|
return $size[$dim];
|
|
}
|
|
|
|
return "$size[0]x$size[1]";
|
|
}
|
|
|
|
/**
|
|
* Get the width of this image.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getWidth() {
|
|
return $this->getDimensions(0);
|
|
}
|
|
|
|
/**
|
|
* Get the height of this image.
|
|
*
|
|
* @return int
|
|
*/
|
|
public function getHeight() {
|
|
return $this->getDimensions(1);
|
|
}
|
|
|
|
/**
|
|
* Get the orientation of this image.
|
|
*
|
|
* @return int ORIENTATION_SQUARE | ORIENTATION_PORTRAIT | ORIENTATION_LANDSCAPE
|
|
*/
|
|
public function getOrientation() {
|
|
$width = $this->getWidth();
|
|
$height = $this->getHeight();
|
|
if($width > $height) {
|
|
return Image_Backend::ORIENTATION_LANDSCAPE;
|
|
} elseif($height > $width) {
|
|
return Image_Backend::ORIENTATION_PORTRAIT;
|
|
} else {
|
|
return Image_Backend::ORIENTATION_SQUARE;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Determine if this image is of the specified size
|
|
*
|
|
* @param integer $width Width to check
|
|
* @param integer $height Height to check
|
|
* @return boolean
|
|
*/
|
|
public function isSize($width, $height) {
|
|
return $this->isWidth($width) && $this->isHeight($height);
|
|
}
|
|
|
|
/**
|
|
* Determine if this image is of the specified width
|
|
*
|
|
* @param integer $width Width to check
|
|
* @return boolean
|
|
*/
|
|
public function isWidth($width) {
|
|
if(empty($width) || !is_numeric($width)) {
|
|
throw new InvalidArgumentException("Invalid value for width");
|
|
}
|
|
return $this->getWidth() == $width;
|
|
}
|
|
|
|
/**
|
|
* Determine if this image is of the specified width
|
|
*
|
|
* @param integer $height Height to check
|
|
* @return boolean
|
|
*/
|
|
public function isHeight($height) {
|
|
if(empty($height) || !is_numeric($height)) {
|
|
throw new InvalidArgumentException("Invalid value for height");
|
|
}
|
|
return $this->getHeight() == $height;
|
|
}
|
|
|
|
/**
|
|
* Wrapper for manipulate that passes in and stores Image_Backend objects instead of tuples
|
|
*
|
|
* @param string $variant
|
|
* @param callable $callback Callback which takes an Image_Backend object, and returns an Image_Backend result
|
|
* @return DBFile The manipulated file
|
|
*/
|
|
public function manipulateImage($variant, $callback) {
|
|
return $this->manipulate(
|
|
$variant,
|
|
function(AssetStore $store, $filename, $hash, $variant) use ($callback) {
|
|
/** @var Image_Backend $backend */
|
|
$backend = $this->getImageBackend();
|
|
if(!$backend) {
|
|
return null;
|
|
}
|
|
$backend = $callback($backend);
|
|
if(!$backend) {
|
|
return null;
|
|
}
|
|
|
|
return $backend->writeToStore(
|
|
$store, $filename, $hash, $variant,
|
|
array('conflict' => AssetStore::CONFLICT_USE_EXISTING)
|
|
);
|
|
}
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Generate a new DBFile instance using the given callback if it hasn't been created yet, or
|
|
* return the existing one if it has.
|
|
*
|
|
* @param string $variant name of the variant to create
|
|
* @param callable $callback Callback which should return a new tuple as an array.
|
|
* This callback will be passed the backend, filename, hash, and variant
|
|
* This will not be called if the file does not
|
|
* need to be created.
|
|
* @return DBFile The manipulated file
|
|
*/
|
|
public function manipulate($variant, $callback) {
|
|
// Verify this manipulation is applicable to this instance
|
|
if(!$this->exists()) {
|
|
return null;
|
|
}
|
|
|
|
// Build output tuple
|
|
$filename = $this->getFilename();
|
|
$hash = $this->getHash();
|
|
$existingVariant = $this->getVariant();
|
|
if($existingVariant) {
|
|
$variant = $existingVariant . '_' . $variant;
|
|
}
|
|
|
|
// Skip empty files (e.g. Folder does not have a hash)
|
|
if(empty($filename) || empty($hash)) {
|
|
return null;
|
|
}
|
|
|
|
// Create this asset in the store if it doesn't already exist,
|
|
// otherwise use the existing variant
|
|
$store = Injector::inst()->get('AssetStore');
|
|
$result = null;
|
|
if(!$store->exists($filename, $hash, $variant)) {
|
|
$result = call_user_func($callback, $store, $filename, $hash, $variant);
|
|
} else {
|
|
$result = array(
|
|
'Filename' => $filename,
|
|
'Hash' => $hash,
|
|
'Variant' => $variant
|
|
);
|
|
}
|
|
|
|
// Callback may fail to perform this manipulation (e.g. resize on text file)
|
|
if(!$result) {
|
|
return null;
|
|
}
|
|
|
|
// Store result in new DBFile instance
|
|
/** @var DBFile $file */
|
|
$file = DBField::create_field('DBFile', $result);
|
|
return $file->setOriginal($this);
|
|
}
|
|
|
|
/**
|
|
* Name a variant based on a format with arbitrary parameters
|
|
*
|
|
* @param string $format The format name.
|
|
* @param mixed $arg,... Additional arguments
|
|
* @return string
|
|
* @throws InvalidArgumentException
|
|
*/
|
|
public function variantName($format, $arg = null) {
|
|
$args = func_get_args();
|
|
array_shift($args);
|
|
return $format . Convert::base64url_encode($args);
|
|
}
|
|
}
|